In Wisconsin, child support is a legal obligation designed to ensure that children maintain a similar standard of living after their parents’ separation or divorce. The state follows a structured approach to calculate child support, guided by the Wisconsin Department of Children and Families (DCF). Wisconsin’s child support calculations prioritize fairness, equity, and the best interests of the child, with recent updates enhancing the accuracy and flexibility of these calculations
Wisconsin uses the “Percentage of Income Standard” as the primary model for calculating child support, though adjustments are made based on custody arrangements, income levels, and other factors. The state distinguishes between different placement scenarios—primary placement, shared placement, and split placement—and applies specific formulas for each.
Below is an overview of the calculation process.
Primary Placement (Sole Custody) – When one parent has the child for more than 75% of the time, the non-custodial parent pays child support based on a standard percentage of their gross income:
- 1 child – 17% of gross income
- 2 children – 25% of gross income
- 3 children – 29% of gross income
- 4 children – 31% of gross income
- 5 or more children – 34% of gross income
For example, if a non-custodial parent earns a gross monthly income of $5,000 and has one child, their child support obligation would be $850 per month (17% of $5,000).
Shared Placement (Joint Custody) – Shared placement applies when both parents have the child for at least 25% of the time. In this scenario, both parents’ incomes and the proportion of time spent with the child are considered. The calculation involves:
- Determining each parent’s base obligation – Each parent’s gross income is multiplied by the standard percentage (e.g., 17% for one child).
- Adjusting for parenting time -The base obligation is reduced in proportion to the percentage of overnights each parent has with the child.
- Calculating the net obligation – The parent with the higher obligation pays the difference to the other parent.
For example, if Parent A earns $4,000 per month and has the child 60% of the time, and Parent B earns $3,000 per month with 40% of the time, the shared-placement formula accounts for both incomes and time spent.
Split Placement – Split placement occurs when parents have multiple children, and each parent has primary custody of at least one child. The percentage of income is prorated based on the number of children. For example, with two children (one with each parent), the percentage is 12.5% per child instead of 25% for two children.
- Special Circumstances – Wisconsin recognizes that standard percentages may not always be equitable. Low-Income payers may have a low-income formula applied to reduce the support obligation. High-Income payers may be subject to a tiered formula where standard percentages apply to a portion of income, with a second set of guidelines applying to the remainder. A third set of guidelines may apply to those with significant income.
- Serial Family Cases – If a parent supports children from multiple relationships, the court may adjust their income to account for prior obligations.
- Healthcare Costs – As of 2024 updates, healthcare costs (e.g., medical, dental, orthodontic, and vision expenses not covered by insurance) are systematically included in child support calculations, with both parents sharing these costs based on their income
Key Factors in Child Support Calculations
Wisconsin courts consider several factors to ensure fair child support orders:
Gross Income – Includes wages, tips, bonuses, commissions, interest, workers’ compensation, unemployment benefits, and more. Courts may impute income if a parent is underemployed or manipulating assets to avoid support obligations
Parenting Time – The proportion of overnights directly impacts shared-placement calculations, emphasizing actual time spent with the child.
Child’s Needs -Costs for childcare, health insurance, and special needs (e.g., medical or educational) are factored in.
Other Obligations – Support for other children or dependents may reduce a parent’s available income for child support
Judges may deviate from standard guidelines if applying them would be unfair to the child or either parent. Deviations require a written explanation and may consider factors like childcare costs, the custodial parent’s ability to remain at home, or extraordinary health needs
Recent Updates to Wisconsin Child Support Laws (2024–2025)
In 2024, Wisconsin introduced significant updates to its child support laws, which remain in effect in 2025. These changes aim to better reflect parents’ financial capabilities and parenting time, ensuring equitable outcomes:
Revised Income Shares Model – The Income Shares Model, which considers both parents’ incomes, was refined to address disparities in financial obligations. It now accounts for daycare costs, health expenses, and primary residence more accurately.
Increased Focus on Parenting Time -Actual parenting time is now a central factor in calculations, promoting a balanced division of financial responsibility. Courts assume equal parenting time unless disputed.
Inclusion of Healthcare Costs – Medical support orders are now standard, ensuring both parents contribute to uninsured medical expenses proportionally to their income.
Incarceration as Involuntary Unemployment – Incarceration is recognized as a significant change in circumstances, potentially reducing support obligations during imprisonment
These updates reflect Wisconsin’s commitment to adapting child support calculations to modern family dynamics and economic realities.
Contact an Experienced Child Support Attorney
Wisconsin’s child support is designed to balance the financial responsibilities of both parents while prioritizing the child’s well-being. For advise on understanding Wisconsin child support calculations and parenting time issues, parents should consult with an experienced Wisconsin family law attorney. Contact the Law Offices of Jane Probst for immediate assistance at 414-210-3135.